Relevance drives our actions and channels our attention; it shapes how we make sense of the world and communicate with each other. Irrelevance spreads a twilight which blurs the line between information we do not want to access and information we cannot access. In disciplines as diverse as philosophy, sociology, the information sciences and linguistics, "relevance" has been proposed as a key concept. This book is the first to bring together the often unrelated traditions. Researchers from different fields discuss relevance and relate it to the challenges of "irrelevance", which have so far been neglected despite their significance for our chances of making well-informed decisions and understanding others. The contributions focus on theoretical and conceptual questions, on specific factors and fields, and on practical and political implications of relevance and irrelevance as forces which are even stronger when they remain in the background.

Phenomenological sociology and ethnomethodology have many adherents and practitioners throughout the world. The international character of interest in these two areas is exemplified by the scholars from Canada, France, Germany, Japan, South Korea, Switzerland, and the United States who contributed to this collection. Together they exemplify the kinds of theoretical and research issues that arise in seeking to explore the social world in ways that respect what Edmund Husserl referred to as "the original right" of all data. These chapters were inspired in various ways by the work of George Psathas, professor emeritus of Boston University, a renowned phenomenological sociologist and ethnomethodologist as well as a fundamental contributor to phenomenological sociology and ethnomethodology movements both in the United States and throughout the world. The collection consists of three parts: phenomenological sociology as an intellectual movement, phenomenological considerations, and ethnomethodological explorations, all areas to which Professor Psathas has made significant contributions. A phenomenological sociology movement in the US is examined as an intellectual movement in itself and as it is influenced by a leader's participation as both scholar and teacher. Phenomenological sociology's efficacy and potential are discussed in terms of a broad range of theoretical and empirical issues: methodology, similarities and differences between phenomenological sociology and ethnomethodology, embodied sociality, power, trust, friendship, face-to-face interaction, and interactions between children and adults. Theoretical articles addressing fundamental features of ethnomethodology, its development, and its relation to process-relational philosophy are balanced by empirical articles founded on authors' original ethnomethodological research-activities of direction-giving and direction-following, accounts for organizational deviance, garden lessons, doing being friends, and the crafting of musical time. Through these chapters readers can come to understand the theoretical development of phenomenological sociology and ethnomethodology, appreciate their achievements and their promise, and find inspiration to pursue their own work in these areas.